Sony TASV-7-AV Service manual

TA-SV7AV

SERVICE MANUAL

Ver 1.0 2001.06

TA-SV7AV is the Amplifier section in MHC-SV7AV.

SPECIFICATIONS

Amplifier section

The following measured at AC 120, 220, 230 – 240 V, 50/60 Hz

Front Speaker:

DIN power output (rated) 95 + 95 watts Continuous RMS power output (reference)

Center Speaker:

DIN power output (rated) 30 watts Continuous RMS power output (reference)

Rear Speaker:

DIN power output (rated) 30 + 30 watts Continuous RMS power output (reference)

Inputs VIDEO (AUDIO) IN: voltage 250 mV, (phono jacks) impedance 47 kilohms MD IN: voltage 450 mV, (phono jacks) impedance 47 kilohms OPTICAL IN: (Square optical connector jacks, rear panel) wavelength 700 nm MIC 1/2: sensitivity 1 mV, (phone jack) impedance 10 kilohms

(6 ohms at 1 kHz, DIN) 120 + 120 watts

(6 ohms at 1 kHz, 10% THD)

(8 ohms at 1 kHz, DIN) 40 watts

(8 ohms at 1 kHz, 10% THD)

(8 ohms at 1 kHz, DIN) 40 + 40 watts

(8 ohms at 1 kHz, 10% THD)

Outputs MD OUT: voltage 250 mV (phono jacks) impedance 1 kilohms VIDEO OUT: max. output level (phono jack) 1 Vp-p, unbalanced,Sync

S-VIDEO OUT: Y: 1 Vp-p, unbalanced, (4-pin/mini-DIN jack) Sync negative,

PHONES: accepts headphones of (stereo mini jack) 8 ohms or more FRONT SPEAKER: accepts impedance of 6 to

REAR SPEAKER: accepts impedance of 8 to CENTER SPEAKER: accepts impedance of 8 to SUB WOOFER OUT: Voltage 1 V,

General

Power requirements Thailand model: 220 V AC, 50/60 Hz Other models: 120 V, 220 V or

Power consumption 300 watts Dimensions (w/h/d) Mass Approx. 7.7 kg Design and specifications are subject to change

without notice.

negative, load impedance 75 ohms

C: 0.286Vp-p, load impedance 75 ohms

16 ohms 16 ohms 16 ohms impedance 1 kilohms

230 – 240 V AC, 50/60 Hz Adjustable with voltage selector

Approx. 280 x 128 x 350 mm

E Model

9-873-154-01 Sony Corporation

2001F0500-1 Home Audio Company C 2001.6 Shinagawa Tec Service Manual Production Group

AMPLIFIER

TA-SV7AV

1. SERVICING NOTES............................................... 3

2. GENERAL ................................................................... 4

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 5

3-2. Cover ............................................................................... 6

3-3. Front Panel Section ......................................................... 6

3-4. Back Panel (2CH/VCD) Section .................................... 7

3-5. FRONT AMP Board ....................................................... 7

4. TEST MODE.............................................................. 8

5. DIAGRAMS

5-1. Note for Printed Wiring Boards

and Schematic Diagrams ................................................ 10

5-2. Printed Wiring Boards – FRONT AMP Section – ........ 11

5-3. Schematic Diagram – FRONT AMP Section (1/2) – .... 12

5-4. Schematic Diagram – FRONT AMP Section (2/2) – .... 13

5-5. IC Pin Function Description ........................................... 14

5-6. Printed Wiring Board

– SURROUND AMP Section – ...................................... 14

5-7. Schematic Diagram

– SURROUND AMP Section – ...................................... 15

5-8. Printed Wiring Boards – CONTROL Section – ............ 16

5-9. Schematic Diagram – CONTROL Section –................. 17

5-10. Printed Wiring Boards – POWER Section – ................. 18

5-11. Schematic Diag ram – POWER Section – ..................... 19

6. EXPLODED VIEWS

6-1. Cover Section .................................................................. 20

6-2. Front Panel Section ......................................................... 20

6-3. Chassis Section ............................................................... 21

7. ELECTRICAL PARTS LIST ............................... 22

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SECTION 1

Turn over the FRONT AMP board with Heat Sink, SURROUND AMP board and RELAY board connected.

Remove the back panel (2CH/VCD) section.

Remove the fan motor connector lead wire.

FRONT AMP board (CN104)

Connect jig (extension cable J-2501-019-A to the FRONT AMP board (CN104) and PANEL board (CN700).

PANEL board (CN700)

SERVICING NOTES

TA-SV7AV

This set is a component of the MHC-SV7AV. The MHC-SV7AV system configuration is as shown below, and therefore it does not operate normally unless all four components are connected. In performing the repair, connect all components with the system cables. Note: The precaution to the users is described on the label stuck on the back panel (Video CD player) and in the troubleshooting section in the Operation Manual.

System Configuration:

AC IN

POWER SUPPLY

MASTER & GRAPHIC µcon

DISPLAY

MODEL IDENTIFICATION

– Back Panel –

PART No.

Model PART No.

Singapore model 4-233-558-2 Saudi Arabia model 4-233-558-3 Thailand model 4-233-558-4

[]

MCE

HTC & VMP µcon

TC µcon

FRONT AMP BOARD SERVICE POSITION

In checking the FRONT AMP board, prepare jig (extension cable J-2501-019-A: 1.25 mm Pitch, 25 core, Length 300 mm) (Fig A)

(Fig A)

TA-SV7AV

Parts Identification

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.

SECTION 2

GENERAL

This section is extracted from instruction manual.

Main unit

A/V amplifier

CINEMA STUDIO A–C 3 (9,

28) DIGITAL 7 (36, 40) ECHO LEVEL 8 (33) ENTER/O/o/P/p 2 (11, 13,

15, 17, 21, 25, 26, 30–33, 35) EQ qs (31) EQ ON/OFF qd (10, 32) FILE SELECT qa (27, 28, 32) FUNCTION 6 (10, 14–17, 24,

25, 34, 36) MIC 1/2 jacks q; (33) MIC LEVEL 9 (33) MULTI CHANNEL DECODING

indicator 4 (29) PHONES jack qj PICTURE EFFECT qg (21) SET UP qf (11, 13, 30, 32, 33) SUR qh (30) VOLUME 5 @/1 (power) 1 (9, 10, 22, 40)

Remote Control

CHECK qd (17) CLEAR qs (17, 19) CLOCK/TIMER SELECT 3

(26, 35)

CLOCK/TIMER SET 2 (13, 25,

34) DBFB ej (27) DIGITAL r; (36, 40) DISPLAY rd (13, 18, 33, 40) D.SKIP 9 (14, 16, 20, 21) ENTER wf (11, 13, 15, 17, 21,

22, 25, 26, 30–33, 35) EQ wh (31) EQ ON/OFF wa (32) FILE SELECT +/– wd (27, 28,

32)

FUNCTION el (10, 14–17, 24,

25, 34, 36) GROOVE ek (27) KARAOKE PON qk (33) KEY CONTROL MD rs (36) Numeric buttons 8 (15, 16, 19,

20, 21) ON SCREEN wk (18) PICTURE EFFECT wl (21) PRESET –/+, PREV/NEXT ea

(14, 15, 20, 22) REPEAT q; (15, 16) RETURN O eg (15) PLAY MODE qa (14, 16, 17, 25) SELECT CD N es (14–17, 19,

21) SET UP w; (11, 13, 30, 32, 33) SLEEP 1 (34) SPECIAL MENU e; (19, 20, 21) SPECTRUM ANALYZER rf

(33) SUR wj (30) TAPE A nN ef (23) TAPE B nN qf (23, 24) TUNER/BAND ed (22) TUNING –/+ qh (22) TV CH +/– 7 (10) TV VOL +/– 6 (10) TV @/1 4 (10) TV/VIDEO rg (10) VIDEO ra (36) VOL +/– ws

/ ql (33)

rg rd

ra el ek ej eg

ed ea

wl wj

1234 5

nNnN

Mm>.

6 7

8 9 q; qa

qd qf

qh qk

qg qj

ql w;

43 5 62

B C

rf rs

980qaqsqdqfqgqhqj

ef es

e; wk

BUTTON DESCRIPTIONS

@/1 (power) 5 X (pause) qj x (stop) qg ./> (go back/go forward)

m/M (rewind/fast forward)

O/o/P/p wg >10 eh

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed.

SET

3-2. COVER

(Page 6)

TA-SV7AV

SECTION 3

DISASSEMBLY

3-3. FRONT PANEL SECTION

(Page 6)

3-5. FRONT AMP BOARD

(Page 7)

3-4. BACK PANEL (2CH/VCD) SECTION

(Page 7)

TA-SV7AV

)

Note: Follow the disassembly procedure in the numerical order given.

3-2. COVER

Remove the cover in the direction of arrow

two screws (case 3 TP2)

three screws

(BVTT3

3-3. FRONT PANEL SECTION

screw (BVTP3 × 8)

front panel section

two claws

lug

screw (BVTP3 × 8)

lug

two screws (case 3 TP2

wire (flat type) (25 core) (CN104)

lug

claw

screw (BVTP3 × 8

three screws (BVTP3 × 8)

two claws

3-4. BACK PANEL (2CH/VCD) SECTION

)

three connectors (CN901, 902, 903)

back panel (2CH/VCD) section

screw (BVTP3

three screws (BVTP3

connector (CN105)

four screws (BVTP3

TA-SV7AV

screw (BVTP3

four screws (BVTP3

3-5. FRONT AMP BOARD

bracket (PWB)

screw (BVTP3

RELAY board

lug

screw (BVTP3

lug

two screws (BVTT3

two connectors (CN106, 113)

PC board holder

three connector (CN913, 914, 915)

PC board holder

Remove the FRONT AMP boar in the direction of the arrow.

TA-SV7AV

SECTION 4

TEST MODE

Note: Use following buttons in the test mode.

no mark: Button of amplifier unit (TA-SV7AV) *1 : Button of tuner unit (ST-SV7) *2 : Button of CD unit (MCE-SV7)

[MC Test Mode]

Enter the MC Test Mode

1. Press the I/1 button to turn the power on.

2. While pressing the both [STEREO/MONO] *1 and [CINEMA

STUDIO C] buttons, press the [CINEMA STUDIO A] button.

3. “GROOVE” indication blinks on the fluorescent indicator tube in the midst of MC test mode.

4. This mode has two modes (mode 1/mode 2).

5. To change the modes, press three buttons in the same manner as entering this mode (step 2). Each time the step 2 operation is repeated, it changes modes alternately.

6. To distinguish the mode, turn the [VOLUME] knob clockwise or counterclockwise. Then display is shown as follows.

Mode 1: only “MIN” or “MAX” Mode 2: “MIN”, “1 to 30” or “MAX”

AMP Test Mode

In the AMP test mode, it operates as follows.

• [VOLUME] knob is turned, it changes display as follows.

Counterclockwise : VOLUME MIN Clockwise : VOLUME MAX

• [FILE SELECT] knob is turned, it changes speak er output mode

as follows.

Display of each mode:

Mode No. Display

1 L: L R: R 2 L: SL R: SR 3 L: LSLC R: RSRW 4 L: LSLC R: RSRW 5 L: C R: W

Details of each mode:

Mode 1 : L-CH: front L-CH

R-CH: front R-CH

Mode 2 : L-CH: rear L-CH

R-CH: rear R-CH

Mode 3 : L-CH: front L-CH, rear L-CH, center

R-CH: front R-CH, rear R-CH, sub woofer (no LFE, “EQ” indication does not light up on the fluorescent indicator tube of tuner unit) Mode 4 : L-CH: front L-CH, rear L-CH, center

R-CH: front R-CH, rear R-CH, sub woofer (LFE on, “EQ” indication lights up on the fluorescent indicator tube of tuner unit) Mode 5 : L-CH: center

R-CH: sub woofer

[GC Test Mode]

Enter the GC Test Mode

Procedure 1:

1. Press the I/1 button to turn the power on.

2. While pressing the both [STEREO/MONO] *1 and [CINEMA

STUDIO C] buttons, press the [CLOCK/TIMER] *

3. LEDs and fluorescent indicator tube are all turned on of all units.

Procedure 2:

1. Press the I/1 button to turn the power on.

2. While pressing the both [PLAY MODE] *2 and x *2 buttons, press the Z (DISC 1) *2 button.

3. LEDs and fluorescent indicator tube are all turned on of all units.

Version Display Mode

Procedure:

1. Enter the GC test mode.

2. Each time the [TUNER MEMORY] *1 or [DISC 1] *2 button is pressed, microcomputer or mechanism deck version is displayed of each unit.

3. Press the [TUNING +] *1 or [DISC 3] *2 button to detail is displayed the version.

Key Check Mode

Procedure:

1. Enter the GC test mode.

2. Press the [TUNING --] *1 or [DISC 2] *2 button to set the key check mode.

3. In the key check mode, the fluorescent indicator tube displays “K 0 J 0 V 0”. Each time a button is pressed, “K” value increases. However , once a button is pressed, it is no longer tak en into account. “J” value increases like 1, 2, 3 ... if turn the knob clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise. “V” value increases like 1, 2, 3 ... if turn the [VOLUME] knob clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.

Releasing the GC Test Mode

T o release from this mode, press three buttons in the same manner as entering this mode or disconnect the power cord.

button.

[FILE SELECT]

Releasing the MC Test Mode

T o release from this mode, press the power cord.

I/1 button or disconnect the

MEMO

TA-SV7AV

+ 19 hidden pages

Sony TASV-7-AV Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. COVER

front panel section

back panel (2CH/VCD) section

3-5. FRONT AMP BOARD

TEST MODE